@inproceedings{joshi-etal-1998-partial,
    title = "Partial proof trees and structural modalities",
    author = "Joshi, Aravind K.  and
      Kulick, Seth  and
      Kurtonina, Natasha",
    editor = "Abeill{\'e}, Anne  and
      Becker, Tilman  and
      Satta, Giorgio  and
      Vijay-Shanker, K.",
    booktitle = "Proceedings of the Fourth International Workshop on Tree Adjoining Grammars and Related Frameworks ({TAG}+4)",
    month = aug,
    year = "1998",
    address = "University of Pennsylvania",
    publisher = "Institute for Research in Cognitive Science",
    url = "https://preview.aclanthology.org/iwcs-25-ingestion/W98-0119/",
    pages = "74--75"
}